OpenDWG is a collection of CAD files, a specification for CAD format,
and proprietary software tools for creating and manipulating CAD
files. We need a similar initiative that is committed to software and
user freedom.

Reversible debugging (the ability to "step backwards" through a program) is an obviously powerful tool. Since being added to this list, GDB has implemented some reversible debugging support. The GDB maintainers are now looking for contributors interested in building on this foundation.